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For controllers, yeah, more or less.

But given the way games also tend to be addicting, I wonder if it hurts people's drive/motivation (on aggregate, not per individual) as much as it helps people's finger dexterity.

I often wonder if certain sports actually do a better job training dexterity, short of focused practice on specific tasks. Or knitting, or juggling, or... heck, even cooking.

To play devil's advocate: how many/which fingers do you use to hold a needle? I'd guess it's roughly the same ;)

You hold a needle with fingers, but you also need to handle it up, down, left, right and rotate it pitch, roll, yaw. Lot more analog than pressing fixed buttons.

Well if there's a game controller that works on surgery motions may be a lot more parents would encourage their kids to play this game.

> how many/which fingers do you use to hold a needle ?

Suturing is not the only thing a Surgeon does...

Building on what another poster said, gamers who play on computer utilize pretty much all of the fingers on their keyboard hand (likely left hand for most people, non-dominant for most). The mouse hand is usually just index, middle, and thumb.